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DOWEX™ MARATHON™ MR-3
Uniform Particle Size, High Capacity, Mixed Ion Exchange Resin for Demineralization
Product
Type
DOWEX™ MARATHON™ MR-3 1:1 by equivalents
cation:anion
Guaranteed Sales Specifications
Total exchange capacity, min.
eq/L
kgr/ft3 as CaCO3
%
Water content
Uniformity coefficient, max.
Whole uncracked beads, min.
%
Typical Physical and Chemical Properties
Mean particle size†
Particle density
Shipping weight
Recommended
Operating
Conditions
†
Matrix
Styrene-DVB, gel
µm
g/mL
g/L
lbs/ft3
Functional group
Sulfonic acid
Quaternary amine
OH- form
1.0
21.9
60 - 72
1.1
90
H+ form
1.9
41.5
46 - 51
1.1
90
OH- form
610 ± 50
1.06
H+ form
760 ± 50
1.22
672
42
• Maximum operating temperature
60°C (140°F)
• pH range
0 - 14
• Bed depth, min.
800 mm (2.6 ft)
For additional particle size information, please refer to Particle Size Distribution Cross Reference Chart (Form No. 177-01775)
Page 1 of 2
™® Trademark of The Dow Chemical Company ("Dow") or an affiliated company of Dow
Form No. 177-01789-0906
Typical properties
and applications
DOWEX™ MARATHON™ MR-3 ion exchange resin is a 1:1 equivalent mixture of DOWEX
MARATHON A (OH) anion and DOWEX MARATHON C-10 (H) cation resins. This product is
a ready-to-use regenerable uniform particle size mixed resin for demineralization.
Packaging
25 liter bags or 5 cubic foot fiber drums
Figure 1. Pressure Drop Data
Temperature = 20° C (68° F)
gpm/ft2
0
4
8
12
16
20
24
28
32
36
40
2
5
4
1
psi/ft
7
6
1.5
bar/m
Pressure Drop
8
3
0.5
2
1
0
0
10
20
30
40
50
60
70
80
90
0
100
m/h
Linear Flow Rate
For other temperatures use:
PT = P20°C / (0.026 T°C + 0.48), where P ≡ bar/m
PT = P68°F / (0.014 T°F + 0.05), where P ≡ psi/ft
Warning: Oxidizing agents such as nitric acid attack organic ion exchange resins under certain conditions. This could lead to
anything from slight resin degradation to a violent exothermic reaction (explosion). Before using strong oxidizing agents, consult
sources knowledgeable in handling such materials.
Notice: No freedom from any patent owned by Seller or others is to be inferred. Because use conditions and applicable laws
may differ from one location to another and may change with time, Customer is responsible for determining whether products
and the information in this document are appropriate for Customer’s use and for ensuring that Customer’s workplace and
disposal practices are in compliance with applicable laws and other governmental enactments. Seller assumes no obligation or
liability for the information in this document. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.
Page 2 of 2
™® Trademark of The Dow Chemical Company ("Dow") or an affiliated company of Dow
Form No. 177-01789-0906